CAREER: Elucidating Fuel Spray Atomization Physics: Setting a Path for High-Efficiency Clean Combustion

职业：阐明燃料喷雾雾化物理：为高效清洁燃烧开辟道路

• 批准号: 1653687
• 负责人: Caroline Genzale
• 金额: $ 52.5万
• 依托单位: Georgia Tech Research Corporation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-05-01 至 2022-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1653687&HistoricalAwards=false
• 关键词: CAREER; Elucidating; Fuel; Spray; Atomization

1653687 GenzaleThis project will develop a new experimental method for measuring fuel spray properties under practical combustion-relevant environments. This work is critical for the advancement of high-efficiency clean combustion engines. These measurements stand to transform our understanding of fuel sprays from empirical to fundamental, because the physical mechanisms of spray breakup under practical combustion conditions have yet to be measured or proven. Determination of the governing mechanisms of fuel spray atomization will help researchers develop more accurate computer models, which will be used as a predictive tool for the discovery of new high-efficiency clean combustion strategies. Educational activities in this project aim to encourage broader participation of women in research careers and to develop a diverse engineering workforce who can innovate the grand challenge solutions that our future world will depend on.The primary research objectives of this proposal are to: 1) measure the joint droplet Sauter Mean Diameter (SMD) and liquid volume fraction field of atomized high-pressure fuel sprays under combustion-relevant conditions, and 2) test un-validated literature hypotheses on the physical mechanisms that lead to interface instabilities and jet breakup in high-pressure fuel sprays, including aerodynamic forces, liquid turbulence, cavitation, and/or orifice flow effects. The research approach is centered on the employment of a new state-of-the-art high-pressure optically-accessible combustion chamber recently commissioned within my laboratory at Georgia Tech via institutional support, which enables optical spray and combustion measurements at up to 100 bar and 900 K. A two-wavelength tomographic extinction measurement is developed to enable simultaneous 3-D measurements of droplet SMD and liquid volume fraction distribution in practical fuel sprays under combustion-relevant conditions. Hypothesis testing of the governing atomization mechanisms in fuel sprays is conducted via measurements with controlled orifice geometry and fuel properties over a wide range of ambient gas density conditions.

1653687 Genzalethis项目将开发一种新的实验方法，用于测量与实际燃烧相关的环境下的燃油喷雾性能。这项工作对于高效清洁燃烧引擎的发展至关重要。这些测量结果可以将我们对燃料喷雾剂从经验转变为基本的理解，因为在实际燃烧条件下喷雾破裂的物理机制尚未衡量或证明。确定燃油喷雾雾化机制的确定将有助于研究人员开发更准确的计算机模型，这将用作发现新的高效清洁燃烧策略的预测工具。 Educational activities in this project aim to encourage broader participation of women in research careers and to develop a diverse engineering workforce who can innovate the grand challenge solutions that our future world will depend on.The primary research objectives of this proposal are to: 1) measure the joint droplet Sauter Mean Diameter (SMD) and liquid volume fraction field of atomized high-pressure fuel sprays under combustion-relevant conditions, and 2) test un-validated literature假设物理机制导致界面不稳定性和高压燃料喷雾剂中的喷气破裂，包括空气动力，液体湍流，气液和/或孔口流动效应。 The research approach is centered on the employment of a new state-of-the-art high-pressure optically-accessible combustion chamber recently commissioned within my laboratory at Georgia Tech via institutional support, which enables optical spray and combustion measurements at up to 100 bar and 900 K. A two-wavelength tomographic extinction measurement is developed to enable simultaneous 3-D measurements of droplet SMD and liquid volume fraction distribution in practical fuel在与燃烧的条件下喷洒。燃料喷雾剂中管理雾化机制的假设测试是通过在各种环境气体密度条件下具有控制孔的几何形状和燃料特性的测量进行的。

项目成果

A multispectral, extinction-based diagnostic for drop sizing in optically dense diesel sprays

• DOI: 10.1177/1468087419866034
• 发表时间: 2020-01
• 期刊: International Journal of Engine Research
• 影响因子: 2.5
• 作者: F. Poursadegh;O. Bibik;Boni F. Yraguen;C. Genzale